三、考点整理
1）In 1850, a law was made to forbid people to help runaway slaves. [forbid sb. to do sth. forbid doing sth.]
2) At that time in the southern states, blacks were not treated as equal citizens.
[ treat…as…=consider…as…=think of…as…=look on…as…=regard…as…=keep…as…]
3) All his life he believed that it was right and necessary to demand changes in society if people did not have their civil rights. [demand vt& n demand to do sth. 坚决要求做某事，demand that…(should )do sth. 要求，接从句（用虚拟语气）
